User Manual

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without liability for errors or omissions. AGD315 User ManualPage 1 of 12

AGD315-205 and AGD315-207

RADAR USERS MANUAL

1 INTRODUCTION

These instructions detail the use and operation

of the AGD315-205 and -207 radars. This

radar has been specifically designed for the

accurate measurement of the speed and range

of passing vehicles when mounted at the side

of the road for enforcement purposes. The

radar is designed to work in conjunction with

an AGD340 radar plus a host, photographic

based, enforcement system. The host system

may be mobile or fixed location in nature.

The radar is supplied in a black plastic

enclosure which incorporates all the radar

circuitry and processing circuitry to perform the

speed and range measurement. The

connection to the radar is via a 1 metre cable

with multi-pin connector, and mounting is

provided by fixings on the housing.

The AGD315-205 is a 24.2GHz frequency

modulated continuous wave (FMCW) radar

whereas the AGD315-207 is a 24.125GHz

(24.075GHz-24.175GHz) radar which are

capable of measuring range and speed. The

radar’s integral planar antenna forms a narrow

beam which is sited at a predetermined angle

across the road. When vehicles pass through

the beam the radar accurately measures the

speed and range at a frame rate of 40

readings per second via an advanced digitising

and tracking technique to a resolution of

approximately 1 mph and 2 metres.

Details of each vehicle speed measurement

are passed to the host system via a high

speed serial communications interface.

Changes or modifications to this equipment,

not expressly approved by AGD Systems Ltd,

may void the user’s authority to operate this

equipment

Contents

1 INTRODUCTION

2 DOCUMENT REVISION

3 FMCW OVERVIEW

4 SPECIFICATIONS

5 SYSTEM HARDWARE OVERVIEW

6 MESSAGE FORMATS

7 RADAR USAGE

8 CABLE CONNECTIONS

9 TEST & CALIBRATION

Summary of content (12 pages)

PAGE 1
AGD315-205 and AGD315-207 RADAR USERS MANUAL 1 INTRODUCTION These instructions detail the use and operation of the AGD315-205 and -207 radars. This radar has been specifically designed for the accurate measurement of the speed and range of passing vehicles when mounted at the side of the road for enforcement purposes. The radar is designed to work in conjunction with an AGD340 radar plus a host, photographic based, enforcement system. The host system may be mobile or fixed location in nature.
PAGE 2
, 2 DOCUMENT REVISION Issue 1 2 Amendment Details Initial Draft DCR3006 – added section relating to test and calibration procedures. Figures and Tables identified using auto-numbered captions. Date of Issue 23/12/2009 14/06/2010 By NK SCH 3 FMCW OVERVIEW 3.
PAGE 3
, 4 SPECIFICATIONS Items Housing Radar General Specification Notes Black UV stabilised polycarbonate Fine spark finish Radar Weight External Dimensions Mounting Fixings 0.
PAGE 4
, Test Cold Dry Heat Damp Heat Free Fall Drop Topple Shock Random Vibration and Sinusoidal Vibration Bump Immersion Component Antenna Transmitter Receiver Radome Parameter Radar Centre Frequency Modulation Bandwidth Operating Frequency Band Environmental Performance Severity Specification IEC 68-2-1 Test Ab (-20 C Operational) IEC 68-2-2 Test Bb +60 C Operational Cyclic 48Hrs 25 C to 40 C 95%RH IEC 68-2-30 Test Db Each top rear corner & each top IEC 68-2-32 Test Ed rear face.
PAGE 5
, Vertical Beamwidth Spurious Emission Code Antenna Sidelobe Suppression 28 degrees < 1 W EIRP (25 to 22000MHz) 80M0FXN >15dB ITU Designation Radar Detection Specified Parameter FFT size Tracking window Image Rejection Measurement rate 256 point Not Applicable Not Applicable 40 Hz Notes Radio Specifications Technical Performance Specifications ETS300.440, AS/NZS4268 FCC 47CFR15.245 The number of speed \ range measurements made per second © AGD Systems Ltd 2010. All rights reserved.
PAGE 6
, 5 SYSTEM HARDWARE OVERVIEW A simplified block diagram of the AGD315-205/207 is shown below: Power Supplies 4k x 18 bit FIFOS TI C6711 DSP & associated components (SDRAM, FLASH etc) PIC 18F452 12 bit ADC DDS \ DAC Amplifier & Filter Subsystem Radar Transceiver Module Figure 1 System Hardware Overview 5.1.1 Serial interface, RS422 A UART interface is provided using RS422 voltage levels, over a 4 wire (full duplex) interface. The default baud rate for this interface is 115200.
PAGE 7
, Parameter Baud rate Data bits Parity bits Stop bits Flow control Value 115200 8 None 1 None Table 1 Default UART Settings The RS422 provides the primary output of the radar in the form of ASCII messages. These messages provide speed and range information. 5.1.2 LED’s No LED’s are visible from the outside of the unit. A number of internal LED’s are provided for test and debug purposes. 5.1.3 Temperature Sensor A digital temperature sensor has been installed on the digitiser board.
PAGE 8
, 6 MESSAGE FORMATS 6.
PAGE 9
, 7 RADAR USAGE 7.1 Introduction For best detection performance the radar must be setup correctly. Failure to do so can result in inaccurate or false detections. 7.2 System Integration The AGD315-205/207 has been designed to be used in conjunction with the AGD340 and a host system. It is the responsibility of the supplier of the host system to ensure that data fusion \ correlation of the speed and range data from the AGD315-205/207 and speed data from the AGD340 is done in such a manner as to be ‘fit for
PAGE 10
, 7.4 Maximum Speed Measurement Normally, the radar can detect targets travelling in both directions simultaneously (if required) at speeds of up to 128mph. The radar can resolve the speed to the nearest Doppler bin, which is approximately equal to 1mph. In some situations, it may be required that the radar measure higher target speeds than 128mph.
PAGE 11
, 8 CABLE CONNECTIONS The AGD315-205/207 connections are shown in the table below: Pin No. Wire Colour Function 1 2 3 4 5 6 7 8 9 Orange \ White White \ Orange Green Blue \ White Brown \ White White \ Brown White \ Blue White \ Green Green \ White 24v ac or 12-24v dc 24v ac or 0v dc Earth / Ground Detector RS422 Y Relay Common Relay Contact Detector RS422 Z Detector RS422 B Detector RS422 A Power Off Power On No Detect Power On Detect N/C N/O N/C Table 4 Cable Connections 9 TEST & CALIBRATION
PAGE 12
, Figure 3 shows the process by which the user settings are configured: START Unit calibrated ? NO Calibrate unit YES Connect to unit via Livewire port Set ranging mode Set 40 FPS Set 22 degrees (via LW port) Values stored in parameter EEPROM Enter serial number xxxxx-yyyyy (via LW port) Values stored in secure EEPROM Enable RS422 port Set baud rate (115200) Reboot unit TEST 11 RS422 OK ? NO FAIL (TEST 11) YES xxxxx-yyyyy from secure EEPROM Check serial number (via RS422 port) TEST 12 Seri